1 Human development is the scientific study of processes of change and stability.  The scientific study of human development began with studies of childhood during the nineteenth century.
verb (used with object), cultivated, cultivating. 1. to prepare and work on (land) in order to raise crops; till. 2. to use a cultivator on. 3. to promote or improve the growth of (a plant, crop, etc.) by labor and attention.
noun. The definition of a cult is a group of people with extreme dedication to a certain leader or set of beliefs that are often viewed as odd by others, or is an excessive and misplaced admiration for someone or something, or is something that is popular among a certain segment of society.